US3848924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile chair base having locking means
Assignee: La Z Boy Inc
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Filing: 1973-09-20
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Granted: 1974-11-19
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Expires: 1993-09-20
Abstract
Abstract The base of the rockable lounger chair has rubber tired wheels at the front end and casters at the rear end. Lever means is employed which is operated by the handle which extends and retracts the leg rest to raise spring pressed plungers from the tires of the front wheels. This permits the chair to be moved to another location only when the leg rest is extended and the chair is locked against rocking movement. When the handle is retracted partially or fully, the position of the leg rest is adjusted or retracted and the front wheels of the chair are locked,retaining the chair in fixed position. In this position the chair will not roll when an occupant is getting in or out of the chair. This is of special advantage when the chair is used in the Health Care Field.
Inventors
- 👤 E Shoemaker
- 👤 E Gensler
- 👤 D White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:20
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/02; B60B33/021; A; A61; A61G; A61G5/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
In a base for a chair, a base frame having side elements with at least one cross bar therebetween, a wheel mounted at the forward end of each side element, a caster mounted at each rear end of said side elements, a spring pressed locking member at the front ends of the side elements which are urged by the springs into engagement with the wheels, a leg rest mounted at the forward end of the chair, link means on the sides of the chair for supporting and moving the leg rest to extended and retracted positions, and means operated when the link means moves said leg rest from retracted position for releasing said locking means.
Claim 2
Dependent Claim
115 words
In a base for a chair, a base frame having side elements with at least one cross bar therebetween, a wheel mounted at the forward end of each side element, a caster mounted at each rear end of said side elements, a spring pressed locking member at the front ends of the side elements which are urged by the springs into engagement with the wheels, a leg rest mounted at the forward end of the chair, link means on the sides of the chair for supporting and moving the leg rest to extended and retracted positions, and means operated when the link means moves said leg rest from retracted position for releasing said locking means.
Claim 3
Dependent Claim
83 words
In a base for a chair as recited in claim 1, wherein each said wheel is mounted on a shaft through an inverted U-shaped bracket, said locking member embodying a rod extending through an aperture in the end web of the bracket, a spring within the bracket about said rod for urging the rod axially, and a lever pivoted to the extending end of said rod for moving the opposite end of the rod away from said wheel when the lever is actuated.
Claim 4
Dependent Claim
44 words
In a base for a chair as recited in claim 2, wherein one end of said lever engages said web, an operating means for the other end of the lever which moves said rod axially and the engaged end thereof away from said wheel.
Claim 5
Dependent Claim
38 words
In a base for a chair as recited in claim 1, wherein each side member of the base has an inwardly extending boss, and a tubular cross member having its ends extending over said bosses and secured thereto.
Claim 6
Dependent Claim
110 words
In a base for a chair as recited in claim 4, wherein said tube has upstanding arms, a square rod rotatably supported by said additional arms fixed to said rod having the free end pivoted to said operating means. 6. In a base for a chair as recited in claim 4, wherein a rotatable rod in said leg rest mechanism is rotated by said handle, an actuating arm fixed onto said rod, and a link connecting the actuating arm to an arm on said first square rod for operating the levers which move the rods to release the wheels when the handle has been moved to leg rest extended position.
Claim 7
Dependent Claim
60 words
A rollable base for a chair, a base having rolling means thereon, means for locking said base against rolling movement, a leg rest, means for moving said leg rest from retracted position to extended position, and means actuated by said leg rest moving means for permitting said chair to be rolled when the leg rest is moved from retracted position.
Claim 8
Dependent Claim
60 words
A rollable base for a chair, a base having rolling means thereon, means for locking said base against rolling movement, a leg rest, means for moving said leg rest from retracted position to extended position, and means actuated by said leg rest moving means for permitting said chair to be rolled when the leg rest is moved from retracted position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |